Cast-rim disk wheel



W. E. WILLIAMS.

CAST RIM DISK WHEEL.

APPLlcATloN man neas 1919.

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INVENTOR INN IQM I@ UNITED ySTATES PATENT OFFICE.

CAST-RIM DISK WHEEL.

T0 all whom it may concern.'

Be it known that I, WILLIAM ERAs'rUs WILLIAMS, a citizen of the United States, a resident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Cast-Rim Disk Wheels, of which the following is a specification.

My invention relates to wheels wherein a rolled plate disk forms the web of the wheel and is secured to the rim and to the hub, er either one of them, by what is known as casting on parts of the wheel. The point being that certain parts of the wheel are formed-from rolled material, which is placed in the molds and other parts are cast on, or poured on, in molten stage and allowed to cool in positionon the parts.

The object of my invention is to produce a very strong and a cheap wheel, and one possessing the merits hereinafter set forth.

Reference will be had to the accompanying drawing, in which Figure 1 is afront elevation of the wheel.

Fig. 2 is a section in the plane of the axes of the hub and a spoke through one-half of the wheel on a larger scale from that of Fig. 1.

In the drawing 1 indicates the ordinary hub of an automobile truck wheel and 2, 3, 4 designate the front, rear and middle portions 'of the rim.

5 indicates a pressed steel disk, which forms the front face of the wheel and 6 indicates a pressed steel disk which forms the rear face of the wheel.

7 indicates diagonal braces connecting across the parts between the front and rear re ions of the disk.

he rear edge 3 of the rim is supported by a cast annular disk portion 8, which eX- tends down and terminates at 9 where it is joined by the outside periphery of the inside pressed steel disk 6.

The middle section of the rim 4 is bridged across between the sections 2 and 3 by a series of flat tie sections 10 and these are stiffened by a series of cross internally extending flanges 11. Some of these fianges extend down as indicated by the portion 12 and connect across to the cast disk portion 8, lbut not all of them do this.

The outer periphery 13 of the disk 5 and l the periphery 14 of the disk 6, as well as the edges around the circular hub' hole, indicated by 15 for the disk 5 and 16 for the Specification of Letters Patent.

rat-enten May 17, 1921.

Application filed December 8, 1919. Serial No. 843,353.

disk 6, are punched out at intervals in the form of notches as shown in dotted lines in Fig. 1 and indicated by 17.

The bracing bars 7 and their ends likewise are prepared by punched holes, and the purpose of these holes or notches in the margins of the plates 5 and G and in the ends ofthe bars 7 is to permit the cast vmetal to flow into the notches or holes forming rivet-like connections of cast on metal. Further, the sharp corners or edges of the holes permit the fusing of the two metals together, the heat for this purpose coming from the molten metal of the casting. Further, with a plate having notched edges. there is a sort of an elastic effect produced in the extreme margin of the edge that aids in preventing shrinkage of the parts in cooling.

These cross rivets or notches also form detents that cause the cast on metal to shrink more or less uniformly, each section by itself, so that the shrinkage is taken up uniformly where it occurs, more or less regardless of what part cools or solidifies-first after the metal is poured, for it is a common occurrence in making castings, to find that the i shrinkage of a wide area has drawn'the metal along with it and produced cracks in the weakest portions, or where the metal was slowest in cooling, the shrinkage being cumulative. By dividing the circumference into distinct shrinkage sections, the shrinkage is not cumulative and there is nowhere enough to produce any crack, and thus4 the notcheshave a valuable secondary function.

The drawings show a wheel provided with screw seats 18, which are-provided for the purpose of fastening thereto the brake band drum, which is normally secured through the holes 19 by bolts or screws.

Bolt holes 21,- are provided for the purpose of attaching anti-skid chains.

tA complete wheel with rolled steel insert webs can be made for less than a wheel entirely of cast metal, and besides, defective wheels are more rare, and the loss on 'a defective wheel is ess. In other words this way of making/a wheel is economical and the Wheels are far less likely to be under serious shrinkage strains. Still further, a double web wheel is not readily cast, partly because molten steel will not fiow well in ahas been found diiiicult to support the necessary central cores accurately in place between the spaces to be occupied b v the A,two plates, or mother words it is dliiicult to have the plates of proper'thickness at all points.

By using pressed plate inserts, it is possible to have Sandor cores supported by' the inserts themselves, thus saving materially in the' cost.

The dished or concave outward shape of my pressed disks or plates permits the same to come and o with a slightY degree of resilience, both 1n the matter of accommodatf ing the disk to shrinkage of the cast parts of the wheel, and also affords having a slight resilience for the wheel in service. i

What I claimv is I:-

1. In a disk wheel, two outwardly divergent rolled metal wheel disks centrally connected by a cast-on hub holding the central margins widely separated and having their outer and more widely separated niargins held in the marginal portions, respectively, of a broad-tread cast-on rim.

2. A wheel having a central hub and a broad tread rim both of cast metal,.said rim having near one margin an integral, dished disk extending across a material portion of Witnesses: y B. J. BERNHARD,

the space between the rim and hub, an anhaving-one margin connected to the hub l a cast-in rolled metal disk and having the' opposite margin connected to a part of the hub distant from the disk first mentioned by integral annular cast portions connected by a smaller cast-in disk of rolled metal.

4. In a wheel of the class described, a double disk wheel having'rolled pressed steel disks forming the webs and the said disk* connected to the hub and tothe rim by means of cast on"1 methods, together with diagvonal bracing between the plates composed of t a series of bars extending diagonally across from the fastening of one plate at the hub over to the fastening of the other plate atthe rim and the said braces secured in the .assembly by having cast 011 their-ends 'the metal of the rim and the hub.

Signed at Chicago, in the county of Uook and Stateo Illinois, this 1st day of December, 1919. i

` WILLIAM ERAS'I'US WILLIAMS. 

